As warm, moist air moves into a region, barometric pressure readings in the region will a) decrease b) increase c) remain the same ?

The correct answer is - a) decrease.

The barometer is an instrument that measures the air pressure, thus the barometric pressure term. The warm, moist air will result in the decrease in the barometric pressure. The reason for that is that the warm and moist air is lighter because the molecules are further apart, so the air pressure drops.

If the air is cold and dry, than the air pressure will increase, and the reason for that is that the molecules are much closer, so the air is heavier. The rainfall also manages to increase the weight of the air, thus increasing the air pressure.

answeramicable; (friendly);

it is very hard for the climatologists to precisely predict how will the global temperatures be changing so there's lots of models, some of which differ significantly, this is due to multiple factors, and probably the most important is the human activity.

humans have been a key factor in climate change around the globe since the start of the industrial revolution, and in the past few decades the consequences are becoming more obvious. there's lots of emission of pollutants in the atmosphere as well as changing the environment on the surface itself, so it's really hard to predict how will that go in the future because there's some countries that are reducing the damage and are going towards green energy, while others are stubbornly continuing with pollution and damages to the environment.